Citrine is a symbol of prosperity, happiness, and self-confidence.  You could relate it to the solar plexus and sacral chakras.  It is one of my favorites, as it reminds me of honey. Yum!   Not edible...
 
Handmade necklace with natural black lava stones. These stones will absorb your favorite essential oils and give off the scent for hours. Use a few drops of a therapeutic grade oil and let the stones soak for a few minutes before wearing. Note: Pay attention to essential oil grades, as lower quality oil can cause skin irritation. Nickel-free materials.